Remove outdated devices from Android device chooser

device/bluetooth/bluetooth_adapter_android.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "device/bluetooth/bluetooth_adapter_android.h"
 
 #include <memory>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
+#include "base/bind.h"
+#include "base/location.h"
 #include "base/sequenced_task_runner.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "device/bluetooth/android/wrappers.h"
 #include "device/bluetooth/bluetooth_advertisement.h"
 #include "device/bluetooth/bluetooth_device_android.h"
 #include "device/bluetooth/bluetooth_discovery_session_outcome.h"
 #include "jni/ChromeBluetoothAdapter_jni.h"
 
 using base::android::AttachCurrentThread;
@@ skipping 142 matching lines @@
     const JavaParamRef<jobject>&
         advertised_uuids) {  // Java Type: List<ParcelUuid>
   std::string device_address = ConvertJavaStringToUTF8(env, address);
   DevicesMap::const_iterator iter = devices_.find(device_address);
 
   if (iter == devices_.end()) {
     // New device.
     BluetoothDeviceAndroid* device_android =
         BluetoothDeviceAndroid::Create(this, bluetooth_device_wrapper);
     device_android->UpdateAdvertisedUUIDs(advertised_uuids);
+    device_android->UpdateTimestamp();
     devices_.add(device_address,
                  std::unique_ptr<BluetoothDevice>(device_android));
     FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
                       DeviceAdded(this, device_android));
   } else {
     // Existing device.
     BluetoothDeviceAndroid* device_android =
         static_cast<BluetoothDeviceAndroid*>(iter->second);
+    device_android->UpdateTimestamp();
     if (device_android->UpdateAdvertisedUUIDs(advertised_uuids)) {
       FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
                         DeviceChanged(this, device_android));
     }
   }
 }
 
 BluetoothAdapterAndroid::BluetoothAdapterAndroid() : weak_ptr_factory_(this) {
+  ui_task_runner_ = base::ThreadTaskRunnerHandle::Get();
+  PurgeTimedOutDevices();
 }
 
 BluetoothAdapterAndroid::~BluetoothAdapterAndroid() {
   Java_ChromeBluetoothAdapter_onBluetoothAdapterAndroidDestruction(
       AttachCurrentThread(), j_adapter_.obj());
 }
 
+void BluetoothAdapterAndroid::PurgeTimedOutDevices() {
+  RemoveTimedOutDevices();
+  ui_task_runner_->PostDelayedTask(
+      FROM_HERE, base::Bind(&BluetoothAdapterAndroid::PurgeTimedOutDevices,
+                            weak_ptr_factory_.GetWeakPtr()),
+      base::TimeDelta::FromMilliseconds(5000));
+}
+
 void BluetoothAdapterAndroid::AddDiscoverySession(
     BluetoothDiscoveryFilter* discovery_filter,
     const base::Closure& callback,
     const DiscoverySessionErrorCallback& error_callback) {
   // TODO(scheib): Support filters crbug.com/490401
   if (Java_ChromeBluetoothAdapter_addDiscoverySession(AttachCurrentThread(),
                                                       j_adapter_.obj())) {
     callback.Run();
   } else {
     // TODO(scheib): Eventually wire the SCAN_FAILED result through to here.
@@ skipping 21 matching lines @@
   // TODO(scheib): Support filters crbug.com/490401
   NOTIMPLEMENTED();
   error_callback.Run(UMABluetoothDiscoverySessionOutcome::NOT_IMPLEMENTED);
 }
 
 void BluetoothAdapterAndroid::RemovePairingDelegateInternal(
     device::BluetoothDevice::PairingDelegate* pairing_delegate) {
 }
 
 }  // namespace device